pcb viewer

Tags: color number font with ROM class implementation int ordinalThis is a very interesting SQL data processing application, the specific requirements are as followsERP needs engineering to combine the coding of the adjacent code with the sum of the BOM amount, cleverly used in the existing sorting number and the group sort number between the solution of the differenceExample:Original data:Required Conversions:Actual post-conversion data:SQL code implementation: withTab1 as(Select 1 as [Rank],1

Tags: PNG rom 9.png and technology weight ASE Col caseI. Original data: select inman,indate from [ fp_db ] . [ dbo ] . [ ppezhpbb where indate > " 2016-5-1 " and indate 2016-6-1 " ORDER by indate Two. After conversion: SELECT CONVERT(varchar( -), Indate, at) Indate,sum( Case whenInman='Lo Dingpeng' Then 1 Else 0 End) Lo Dingpeng,sum( Case whenInman='Wangbo' Then 1 Else 0 End) Wangbo,sum( Case whenInman='Liao Guan Long' Then 1 Else 0 End) Liao Guan Long,sum( Case

thread_struct thread is saved to the task_struct of the stop process; File system Information struct fs_struct *fs; Open file information struct files_struct *files; Signal processing function spinlock_t Sigmask_lock; struct Signal_struct *sig; Signal processing function sigset_t blocked; A signal that the process is currently blocking, with each signal corresponding to a struct sigpending pending; Whether the process is pending signal unsigned long sas_ss_sp; size_t Sas_ss_size; Int (*no

Annotated Source: http://www.cnblogs.com/einstein-2014731/p/5650943.htmlCadence is more cumbersome to use than Altiumdesigner, but more open and flexible, and it's a good choice to get used to.The method of adding Chinese characters to the PCB was found on the Internet and summarized below.1, install AutoCAD, I use 2010, and install the Express tool tools.If AutoCAD is already on the computer, but the plugin is not selected, it can be done by: program

The next-door King has already talked about the principle of TDR and how to determine the TDR resolution. So, we have to correctly measure the circuit impedance on the PCB board, and what needs to be noted?1, the impedance Test industry standardsHave posted a lot of impedance test pictures, re-paste a picture for everyone to see. Impedance is not an imaginary straight line, but a downs. In the front and back end will be affected by the probe or open c

This semester we learn the operating system, so we have to write a PCB.So I borrowed a bit of Windows PCB, wrote thisImportsSystem.Runtime.InteropServices" " " "This is the legendary PCB." " StructurekprocessDimHeader asDispatcherheaderDimProfilelisthead as LinkedList( of Processprofilesimulator) DimDirectorytablebase as UInteger DimLdtdescriptor asKernelglobaldescriptortableentryDimInt21descriptor as

1 Creating a PCB file---New2 Create a Board box add-on line, choose the option selection, the frame is long 4400mil width 32003 to the PCB frame chamfer (can not do): manufacture, drafting, Fillet (round), in the Options option, the chamfer radius is set to 100milMethod: Which corner to pour, the right mouse click on the corner of the two sides, four corners are poured, the right mouse button and done4 Add

Open the schematic and the corresponding PCB, click Pads Layout in the toolbar to connect the schematic and PCB.Right-Select the original in the schematic to select a module, and then right-click on the PCB to select a module to put together.When moving, rotate the originals by pressing the TAB key, Ctrl+e move the originals, and press Ctrl+r in situ. Select the original right-click feature to place the ori

is actually painted the most tangled piece of PCB, the left wiring is very easy, but the right 32 chip to FSMC, there are a lot of out of the IO port, cross-tangled together, there are a few lines all the way to hit 3, 4 through the hole, it is difficult to cloth.Engineering Check the next is the June 17 painting schematic diagram, today, at noon, and then today 3 o'clock in the afternoon to vote for Gali, almost two weeks of time, although there are

2004 accompany the German customers to visit the manufacturers, walked a circle, and finally to the PCB factory. Still the dirty, I took them a quick lap into the factory's conference room. Before, the German foreigner asked me to accept the "Gerber" file? I had no idea what he was talking about, so he replied that I needed the CAD file and he looked embarrassed. I sent to the factory is all the Protel format of the

interference refers to the interference source passing through spaceCouple the signal (interference) to another electrical network. In the design of high-speed PCB and system, high-frequency signal lines and integrated electricalChannel pins and various connectors may become radiation sources with antenna characteristics, which can emit and affect electromagnetic waves.The normal operation of the system or other subsystems in the system.Since the eme

This is an assignment in the operating system class. I attended the course. Maybe it is because of the attendance that I always hold on to the task with a single delay, I have no idea about my homework in this course. This process scheduling job has already been handed in. I want to write some programs over the past two days. By the way, I will update the content in my blog. If you talk less, you can write more comments instead of organizing the language. Basic Structure: Use the data structure

The computation of PCB streaming capability has always lacked authoritative technical methods and formulas. Experienced CAD engineers rely on their personal experience to make more accurate judgments. However, it is difficult for new users to use CAD. The current Loading Capacity of PCB depends on the following factors: line width, line thickness (copper foil thickness), and allowable temperature rise. As

Because our circuit board obviously cannot use the auto-wiring function, we should pay attention to the price of moving components at a time, especially holding computers with ultra-slow speed. While our PCB Board is still relatively complex, with many layers, multiple channels, and more room. Therefore, we need to fix the key devices or room, to avoid unnecessary movement of components. In the PCB, this i

1. Signal line do not take the corner, go straight. 2.PCB, at right angles there will be radiation effects, electromagnetic compatibility problems. 3. Follow the modular layout and regional layout. 4. Line thickness consistent, otherwise it will heat uneven, welding problems. 5. Ground mode, single point grounding, multi-point grounding. 6. Determine where the noise comes, first exclude peripheral devices, and then eliminate the program, and fina

Fritzing is a set of software designed for PrintedCircuitBoard printed circuit boards. It is a tool especially intended for designers, artists, researchers, and amateurs. Like Processing and Arduino, Fritzing developers design this software in the spirit of openness, simplicity, and sharing. Fritzing is a simple and easy-to-use software operation interface, this allows users to easily design PCB printed circuit boards without the background of an elec

Always wanted to make a minimum system, this time finally put the idea into reality. Schematic diagram is as follows:The PCB diagram is as follows:After a few days, the board finally mailed to, is the following bear-like.Welding the voltage regulator circuit, found that the voltage regulator circuit schematic part of the wrong, no grounding, and then fly the root line, the regulator circuit is stable and easy to use.Welding Stm32 chip, where VCC and g

PCB Inspection MattersCheck that the device is all finished,Check that the cables are all finished,Check dangling Line,via,See if the copper skin is isolated and has no network copper skin,Check the DRC,1. Select the menu display-status to see if the marker is at 0%2. Execute Tool-quick report-unplaced Component report.3. Execute Tool-quick report-design Rules Check.Creating a drill Table1. Select Menu Manufacture-nc-drill Legend2. With the default se

Glass-based panels can be used at temperatures up to 150 ℃ to 250 ℃. The optional media materials are: FR4, dielectric constant ε0 of 4.6 Epoxy material, dielectric constant ε0 is 3.9; Polyimide, dielectric constant ε0 is 4.5. In addition, PTFE-based materials have the lowest dielectric constant and operate at temperatures up to 300 ℃, where PTFE, dielectric constant ε0=2.1; thermally solid PTFE, dielectric constant ε0=2.8; Glass-fiber PTFE, dielectric constant ε0=2.4;

Note: The post posted by the author on www.21ic.com is now reproduced. Http://bbs.21ic.com/icview-343175-1-1.html part 1/3. When editing a blog post, the typographical conflicts with the web page have been changed several times. I don't know if it is a problem with sogou browser. Once the pictures on bbs.21ic. com are referenced, the layout of the blog is disordered. If you know the situation, tell me the reason. Thank you. First PCB: Bytes ----